US

Workers check on the flag placement on the stage as they prepares for the third day session of the Democratic National Convention in Philadelphia, Wednesday, July 27, 2016. (AP Photo/John Locher)

John Locher/AP

Workers check on the flag placement on the stage as they prepares for the third day session of the Democratic National Convention in Philadelphia 

epa05442919 Delegates react as Democratic Nominee for United States President Hillary Clinton appears live via satellite at the conclusion of the second day of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, USA, 26 July 2016. The four-day convention is expected to end with Hillary Clinton formally accepting the nomination of the Democratic Party as their presidential candidate in the 2016 election.

Justin Lane/EPA

Delegates react as Democratic Nominee for United States President Hillary Clinton appears live via satellite at the conclusion of the second day of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, USA 

 Republican presidential candidate Donald Trump addresses delegates at the end of the last day of the Republican National Convention on July 21, 2016, in Cleveland, Ohio

Timothy Clary

Republican presidential candidate Donald Trump addresses delegates at the end of the last day of the Republican National Convention in Cleveland, Ohio

Republican National Convention: Day Three

Chip Somodevilla/Getty Images

A delegates holds signs in support of Republican presidential candidate Donald Trump and Republican vice presidential candidate Mike Pence during the opening of the third day of the Republican National Convention

Jaimes Campbell, who advocates for open carry, stands with a gun as police walk by in Cleveland Public Square outside the Republican National Convention in Cleveland, Ohio

Andrew Kelly/Reuters

Jaimes Campbell, who advocates for open carry, stands with a gun as police walk by in Cleveland Public Square outside the Republican National Convention in Cleveland, Ohio.

BATON ROUGE, LA - JULY 15:  The body of Alton Sterling, who was shot and killed by Baton Rouge Police officers, lies in a casket as he is brought into his funeral at Southern University on July 15, 2016 in Baton Rouge, Louisiana.  (Photo by Sean Gardner/Getty Images)

Sean Gardner/Getty

The body of Alton Sterling, who was shot and killed by Baton Rouge Police officers, lies in a casket as he is brought into his funeral at Southern University in Baton Rouge, Louisiana 

Dallas Police respond after shots were fired at a Black Lives Matter rally in downtown Dallas

The Dallas Morning News/AP

Dallas Police respond after shots were fired at a Black Lives Matter rally in downtown Dallas

 A spotlight catches the top of Democratic presidential candidate Hillary Clinton's head, as she enters to address the National Education Association's 95th Representative Assembly in Washington, DC, USA, 05 July 2016. NEA is the largest labor union in the United States.  EPA/MICHAEL REYNOLDS

Michael Reynolds/EPA

A spotlight catches the top of Democratic presidential candidate Hillary Clinton‘s head, as she enters to address the National Education Association’s 95th Representative Assembly in Washington D.C.

An attendee wears socks in support of Hillary Clinton, former Secretary of State and presumptive Democratic presidential nominee, not pictured, ahead of a campaign event in Cincinnati, Ohio, U.S., on Monday, June 27, 2016. Clinton released a new national television ad on Sunday attacking likely Republican rival Donald Trump for his comments on the U.K's decision to leave the European Union, and later warned of the negative impact that "bombastic" behavior can have at times of crisis

Ty Wright/Bloomberg

An attendee wears socks in support of Hillary Clinton, former Secretary of State and presumptive Democratic presidential nominee, not pictured, ahead of a campaign event in Cincinnati, Ohio, U.S.

Firefighters mop-up a hot spot  at a residence levelled by the Erskine Fire in South Lake, California, USA

Noah Berger/Reuters

Firefighters damp-down a hot spot at a residence levelled by the Erskine Fire in South Lake, California, USA

Republican presidential candidate Donald Trump waves as he arrives at his Turnberry golf course, in Turnberry, Scotland, Britain June 24, 2016.      REUTERS/Clodagh Kilcoyne

Clodagh Kilcoyne/Reuters

Republican presidential candidate Donald Trump waves as he arrives at his Turnberry golf course, in Turnberry, Scotland, Britain

US Democrats staged a rare sit-in Wednesday in the House of Representatives, demanding that the Republican-led body vote on gun-control legislation following the Orlando nightclub massacre

Handout/AFP/Getty

US Democrats staged a rare sit-in Wednesday in the House of Representatives, demanding that the Republican-led body vote on gun-control legislation following the Orlando nightclub massacre

Jun 21, 2016; Toronto, Ontario, CAN; Toronto Blue Jays center fielder Kevin Pillar (11) catches a fly ball for an out during the fourth inning in a game against the Arizona Diamondbacks  at Rogers Centre. Mandatory Credit: Nick Turchiaro-USA TODAY Sport

Nick Turchiaro/Reuters

Toronto Blue Jays center fielder Kevin Pillar (11) catches a fly ball for an out during the fourth inning in a game against the Arizona Diamondbacks at Rogers Centre, Toronto 

Runners pass under the the flags flying at half-staff around the Washington Monument at daybreak in Washington, Monday, June 13, 2016. The flags were ordered to half-staff by President Barack Obama to honor the victims of the Orlando nightclub shootings. (AP Photo/J. David Ake)

David Ake/AP

Runners pass under the the flags flying at half-mast around the Washington Monument at daybreak in Washington. The flags were ordered to half-staff by President Barack Obama to honor the victims of the Orlando nightclub shootings 

A well-wisher holding a banner touches the hearse carrying the remains of Muhammad Ali during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S., June 10, 2016.   REUTERS/Adrees Latif

Adrees Latif/Reuters

A well-wisher holding a banner touches the hearse carrying the remains of Muhammad Ali during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, U.S

WASHINGTON, DC - JUNE 09: (EDITORS NOTE: Retransmission with alternate crop.)   Democratic presidential candidate Sen. Bernie Sanders (D-VT) (L) walks with President Barack Obama (R) through the Colonnade as he arrives at the White House for an Oval Office meeting June 9, 2016 in Washington, DC. Sanders met with President Obama after Hillary Clinton has clinched the Democratic nomination for president. (Photo by Alex Wong/Getty Images)

Alex Wong/Getty

Democratic presidential candidate Sen. Bernie Sanders walks with President Barack Obama through the Colonnade as he arrives at the White House for an Oval Office. Sanders met with President Obama after Hillary Clinton has clinched the Democratic nomination for president

SANTA MONICA, CA - JUNE 07: A man holds a sign at the California primary election night rally for Democratic presidential candidate Senator Bernie Sanders (D-VT) on June 7, 2016 in Santa Monica, California. Hillary Clinton held an early lead in today's California primary.  (Photo by David McNew/Getty Images)

David McNew/Getty

A man holds a sign at the California primary election night rally for Democratic presidential candidate Senator Bernie Sanders (D-VT) in Santa Monica, California

TOPSHOT - US First Lady Michelle Obama cheers during the White House Turnaround Arts Talent Show at the White House May 25, 2016 in Washington, DC.  Students from throughout the US performed at the presidential mansion showcasing the power of arts education.  / AFP PHOTO / Brendan SmialowskiBRENDAN SMIALOWSKI/AFP/Getty Images

Brendan Smialowski/AFP/Getty

US First Lady Michelle Obama cheers during the White House Turnaround Arts Talent Show at the White House in Washington D.C. Students from throughout the US performed at the presidential mansion showcasing the power of arts education 

Orange County Sheriff's deputies take a protester into custody outside the Anaheim Convention Center where Republican presidential candidate Donald Trump held a rally

Jae C. Hong

Orange County Sheriff’s deputies take a protester into custody outside the Anaheim Convention Center where Republican presidential candidate Donald Trump held a rally

A U.S. Capitol Police officer humorously reacts to Code Pink for Peace activist Medea Benjamin's protest sign

Chip Somodevilla/Getty Images

A U.S. Capitol Police officer reacts to a Code Pink for Peace activist’s protest sign